X-Men: Days of Future Past (I would probably like this more if only I didn't see the leaked footage so I'm not gonna criticize the footage, but I don't like the music and it doesn't look very polished.

(tie). X2: X-Men United (this one is kinda hard to rank, I really liked the other trailer for X2, but trailer #1 looks dated now, not because of the footage but because of the background music/editing style)

(tie). The Wolverine (its interesting but the trailer is just not exciting)